Cadmium Sulfide

Title: Cadmium Sulfide
CAS Registry Number: 1306-23-6
Additional Names: C.I. 77199
Trademarks: Capsebon (Pitman-Moore)
Molecular Formula: CdS
Molecular Weight: 144.48
Percent Composition: Cd 77.80%, S 22.19%
Literature References: Occurs in nature as the mineral greenockite. Prepd from CdSO4 + H2S: Milligan, J. Phys. Chem. 38, 797 (1934); Frerichs, Naturwissenschaften 33, 281 (1946); prepn of single crystals: Grillot, Compt. Rend. 230, 1280 (1950); Czyzak et al., J. Appl. Phys. 23, 932 (1952); Wagenknecht, Juza in Handbook of Preparative Inorganic Chemistry vol. II, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1965) pp 1098-1099. See also Colour Index vol. 4 (3rd ed., 1971) p 4659.
Properties: Light-yellow or orange-colored cubic or hexagonal crystals. Cubic structure: d 4.50; hexagonal structure: d 4.82. The light-yellow variety is also known as Cadmium Yellow or Jaune Brilliant. d 4.82. Sublimes at 980°. Soly in water (18°): 0.13 mg/100 g. Sol in concd or warm dil mineral acids with evolution of H2S; readily dec and dissolved by moderately dil HNO3.
Density: d 4.50; d 4.82; d 4.82
CAUTION: Cadmium and cadmium compounds are listed as known human carcinogens: Report on Carcinogens, Eleventh Edition (PB2005-104914, 2004) p III-42.
Use: As a pigment being fast to light and not affected by H2S; color for soaps; coloring glass yellow; coloring textiles, paper, rubber; in printing inks, ceramic glazes, fireworks; in phosphors and fluorescent screens; in scintillation counters, semiconductors, photoconductors.
Therap-Cat: Dermatologic.
Cadmium Telluride Cadmium Tungstate(VI) Cadusafos Cafaminol Cafestol

Cadmium sulfide
3D model of the structure of hawleyite 3D model of the structure of greenockite
Cadmium sulfide.jpg
Identifiers
CAS number 1306-23-6 YesY
PubChem 14783
ChemSpider 7969586 YesY
UNII 057EZR4Z7Q YesY
EC number 215-147-8
UN number 2570
RTECS number EV3150000
Jmol-3D images Image 1
Properties
Molecular formula CdS
Molar mass 144.48 g mol−1
Appearance Yellow-orange to brown solid.
Density 4.826 g/cm3, solid.
Melting point 1,750 °C; 3,180 °F; 2,020 K (10 MPa)
Boiling point 980 °C; 1,800 °F; 1,250 K (subl.)
Solubility in water insoluble[1]
Solubility soluble in acid
very slightly soluble in ammonium hydroxide
Refractive index (nD) 2.529
Structure
Crystal structure Hexagonal, Cubic
Thermochemistry
Std molar
entropy So298
65 J·mol−1·K−1[2]
Std enthalpy of
formation ΔfHo298
−162 kJ·mol−1[2]
Hazards
MSDS ICSC 0404
EU Index 048-010-00-4
EU classification Carc. Cat. 2
Muta. Cat. 3
Repr. Cat. 3
Toxic (T)
Dangerous for the environment (N)
R-phrases R45, R22, R48/23/25, R62, R63, R68, R50/53
S-phrases S53, S45, S61
NFPA 704
NFPA 704.svg
0
3
0
Flash point Non-flammable
LD50 7080 mg/kg (rat, oral)
Related compounds
Other anions Cadmium oxide
Cadmium selenide
Other cations Zinc sulfide
Mercury sulfide
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow solid.[3] It occurs in nature with two different crystal structures as the rare minerals greenockite and hawleyite, but is more prevalent as an impurity substituent in the similarly structured zinc ores sphalerite and wurtzite, which are the major economic sources of cadmium. As a compound that is easy to isolate and purify, it is the principal source of cadmium for all commercial applications.[3]